Scientific journal
Название журнала на английском
ISSN 2500-0802
ПИ №ФС77-61154

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THE PRODUCT OF POLYETHYLENE TEREPHTHALATE CHEMICAL DESTRUCTION AS THE COMPLEX REAGENT FOR COAL ORGANIC MASS EXTRACTION

Bodyan L.A. 1 Varlamova I.A. 1 Girevaya H.Y. 1 Kalugina N.L. 1 Medyanik N.L. 1
1 Nosov Magnitogorsk State Technical University
The product of polyethylene terephthalate chemical destruction was obtained. Quantum-chemical parameters of compounds-components of the destruction product (ethyleneglycolterephthalate, diethyleneglycolterephthalate, terephthalic acid, ethyleneglycol) were calculated, and these results were a foundation to evidence presence of active electron donor (nucleophilic) centers on oxygen atoms of carboxyl, ester and hydroxyl groups. Quantum-chemical parameters of functional groups which modeled a structure of the coal organic mass (COM) were calculated, and they were a basis to establish presence of electron acceptor (electrophilic) adsorption centers with maximum positive charge on coal surface carbon fragments. COM - reagent interaction runs using the charge-controlled mechanism was established: COM’s active adsorption centers give lower unoccupied molecular orbitals (LUMO), components of the polyethylene terephthalate destruction product give highest occupied molecular orbitals (HOMO). The ability to use the polyethylene terephthalate destruction product as a complex reagent which combines collector and foamer properties to extract coal organic mass was proved. Use of the complex reagent leads to better parameters of flotation in comparison with traditional flotation reagents as thermogasoil and waste still bottoms of butyl alcohols was obtained. When reagent consumption was reduced 3.5 times concentrate output increased by 4.5% with nearly the same ash.